mom never questioned bobby again. two can play at this game. [ female announcer ] swap one snack a week for a yoplait. and everybody wins. yoplait. it is so good. "just singin' singin' in the rain ♪ >>> some very famous hollywood threads are up for auction. the gray wool suit gene kelly wore in the "singin' in the rain" scene you see right there goes on sale friday. it's expected to fetch more than $20,000 at auction in dallas. the collector bought the suit at an mgm prop sale in 1970 for $10. pretty good investment. >>> a math teacher at penn state university is getting attention for more than just academic work. he also happens to be on the football team. jim axelrod introduces us to the nfl prospect. >> go! >> reporter: strictly by the numbers 6'3", 300 pounds, first team all big ten. penn state offensive lineman john urschel is exceptional. >> xy squared -- vaeld from y equals x. >> reporter: but it's another set of numbers that elevate him to unique in college football. >> this goes off the integral from zero t